842717691 has 12 divisors (see below), whose sum is σ = 1222111800. Its totient is φ = 559572000.

The previous prime is 842717653. The next prime is 842717717. The reversal of 842717691 is 196717248.

It is a happy number.

It is not a de Polignac number, because 842717691 - 2⁷ = 842717563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842717791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184266 + ... + 188783.

It is an arithmetic number, because the mean of its divisors is an integer number (101842650).

Almost surely, 2^842717691 is an apocalyptic number.

842717691 is a deficient number, since it is larger than the sum of its proper divisors (379394109).

842717691 is a wasteful number, since it uses less digits than its factorization.

842717691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373306 (or 373303 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 842717691 is about 29029.6002556012. The cubic root of 842717691 is about 944.5552589383. Note that the first 3 decimals are identical.

The spelling of 842717691 in words is "eight hundred forty-two million, seven hundred seventeen thousand, six hundred ninety-one".